Percolator.



1. Fgsmm & 1. B. GRIFFIN. PERCOLATOIL APPLICATION FILED OCT-21. {916" Patented Dec. 25,1917.

UNITED STATES PATENT QFFTFL JOSEPH F. SMART AND JOHN B. GRIFFIN, OF NEW BRITAIN, CONNECTICUT, ASSIGNORS TO LANDERS, FRARY & CLARK, OF N'IEW BRITAIN, CONNECTICUT, A COBIPORATIGN OF CONNECTICUT.

PERCOLATOR.

Specification of Letters Patent.

Patented Dec. 25, 1917.

Application filed October 21, 1916. Serial No. 126,847.

To all whom it may concern:

Be it known that we, JosnPH F. SMART and JOHN B. GRIFFIN, citizens of the United States, residing at New Britain, county of Hartford, State of Connecticut, have invented a certain new and useful Improve ment in Percolators, of which the following is a full, clear, and exact description.

Our invention relates to improvements in percolators and has for its object to provide an interior element for a percolator, constructed in such a manner as to have neither screw-threaded nor soldered joints.

The following is a description of an embodiment of our invention, reference being had to the accompanying drawings, in which,

Figure 1 is a vertical section of an interior percolator-element embodying our invention.

Fig. 2 is a side elevation of the tube at one stage of its manufacture;

Fig. 3 is a plan view of the same;

Fig. 4 is a side elevation of said tube at a subsequent stage of its manufacture with a clamping plate added thereto;

Fig. 5 is a plan view and side elevation of a second clamping plate;

Fig. 6 is a plan view and side elevation of the clamping plate of Fig. 4;

Fig. 7 is a plan view of the base member;

Fig. 8 is an enlarged sectional view on the line 8-8, Fig. l; and

Fig. 9 is an enlarged View partly in section on the line 99, Fig. 4.

Referring more particularly to the drawing (Fig. l), 1 is a tubular member having at its bottom a swaged projection 2, having an angular contour as shown in Figs. 2, 3 and at and having also swaged projections 3 and 4 as shown in Figs. 1 and 4, between which is held a supporting plate 5 having a rectangular opening 6 as shown in Fig. 6. The swaging of the metal to form the projections 3 and 4 causes the metal to flow more or less into the angles of the rectangular opening 6. 7 is a bottom member forming a cover for producing a steam chamber, said bottom member being provided at its top with a rectangular opening or recess 8, in which fits the projection 2 of the tube 1. The lower end of the tube 1 when in the condition shown in Fig. &, is inserted into the upper end of the member 7 so that the rectangular portion 2 lie in the rectangular opening 8 and the extreme lower end of the tube 1 is then swaged or spun as shown at 9, Fig. 1, so as to be expanded and hold the member 7 upon the tube 1.

10 is the cup for holding the coffee, the same being perforated on its sides and bottom in the ordinary manner. The bottom of this cup engages the plate 5 and is provided with three equidistant perforations 11. One of the plates 5 and 13 is provided with means for securing the cup 10 to the other plate, said means consisting of rivetlike projections which pass through the perforations 11 and over so as to hold the cup in place. In the construction illustrated, these rivet-like projections are carried by the plate 13 and are bent over as shown in Fig. 1 so as to have their lower ends engage the lower surface of the plate 5 and securely clamp the bottom of the cup 10 thereto. The other plate 5 is shown as provided with spaced recesses 14 to receive the projections 12.

The rivet-like projections constituting the means for securing the cup to the plate 5 are preferably integral with one of the plates 5 and 13, and the plate 13 is preferably used so that the plates 5 and 13 are both clamping pllates holding the bottom of the cup between t em.

The plate 5 is securely fastened to the tube, and, the lower surface of the cup 10 resting thereon, its weight is supported independently of the bent projections 12, this arrangement being the preferred construction. The angles on the tube and the angular openings in the first clamping plate and bottom element render the engaging surfaces at those points so irregular as to prevent the turning of the clamping plate, cup and bottom member upon the tube, so that by the means described all the members of the interior element are securely and rigidly fas tened together without the use of screwthreads and without the use of solder.

As will be evident to those skilled in the art, our invention permits of various modifications without departing from the spirit thereof or the scopeof the appended claims.

lVhat we claim is:

1. In a percolator element, the combination of a tube having a projection thereon, a clamping plate mounted upon said tube adjacent to said projeetiom a second clamping plate mounted on said tube and located on the side of said first elampir plate adjacent to said projection so that vsaid projection lies between said pla /cs and a cup having its bottom portion between said plates. one of said plates having projections engag ing the side of the other plate remote from said bottom portion.

52. in a percolator element, the combination of a tube ha *ing a projection thereon, a olan'iping plate mounted upon said tube adjacent to said projection. a second clamping plate mounted on said tube and located on the side of said first clamping plate adjaeent to said projection so that said projection lies between s .id plates. and a cup ha ing its bottom portion. between said plates. one of said plates having projections engaging the side of the other plate remote from said bottom portion said tube having a second projection, and said first clamping plate Copies of this lying bet veen and engaging both of the said projections of said tube.

13. percolator element comprising a tube having two adjacent flanges thereon, a perforated plate held between and engaging said flanges, a cup having its bottom adjacent to said plate and provided With a central openin and with openings surrounding said central openin and means passing through said surrounding openings in said bottom for holding it to said plate.

at. A percolator element comprising a tube having two adjacent flanges thereon, a per tor-ated plate held between said flanges, a cup having its bottom adjacent to said plate and means passing through openings in said bottom for holding it to said plate, the opening for the tube in said plate and the tube at the point between said flanges being irregular so as to prevent relative turning.

JOSEPH F. SMART. JOHN B. GRIFFIN.

patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

